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허열 ( Yol Heo ),이처근 ( Cheo Keun Lee ),오승탁 ( Seung Tak Oh ) 충북대학교 건설기술연구소 2010 建設技術論文集 Vol.29 No.1
There are wide regions of normally consolidated, or lightly overconsolidated soft clay deposits found in the western and southern Korea. The water contents of these layers are between 30% and 70% and undrained shear strength is around 10~30kPa. In this study, the characteristics of clay in Busan area, which is representative harbor in south coast and has been investigated for the diverse soil data because a large scale of harbor construction has been constructed, was investigated through the laboratory tests and field tests data.
허열 ( Yol Heo ),박성훈 ( Seong Hoon Park ),정유진 ( Uoo Jin Jeong ),김은지 ( Eun Gi Kim ) 충북대학교 건설기술연구소 2011 建設技術論文集 Vol.30 No.1
The incinerated municipal solid waste can be classified into two general types of ash fly ash and bottom ash. Although the incierated, too much different according to the object incinerated, too much difference in physical characteristics and chemical components, have some similarities in view of elimination in powdered form. The disposal of powdered waste have been mostly treated by reclamation, and the exisiting study on recycling is been used as a substitute method which involves mixing the regular quantity of powdered ash with brick,hence producing a cement inter-rocking block etc.
허열(Heo Yol),권선욱(Kwon Seonwuk),이처근(Lee Cheokeun),배우석(Bae Wooseok) 한국지반환경공학회 2010 한국지반환경공학회논문집 Vol.11 No.7
한반도 남해안 부산지역의 해성점토에 대하여 물리적 특성을 사전 파악하고, 지반 강도정수의 상관성을 분석하기 위하여 비교적 신뢰성이 크다고 할 수 있는 대형 항만공사 자료를 활용하였다. 분석자료의 정도를 높이기 위하여 해성점토만을 대상으로 하였다. 통일분류법으로 ML, MH, CL, CH, ML-CL에 해당되는 자료는 분석대상에 포함하였으며, SC로 분류되는 자료는 분석대상에서 제외하였다. 지반강도 특성에 대한 분석은 일축압축시험, 삼축압축시험, 현장베인시험 결과에 의한 비배수 전단강도, 예민비, 유효마찰각에 대하여 분석하였으며, 자료분석시 통계분석을 통하여 이상치를 제거하였으며, 또한, 교란도분석을 수행하여 결과에 대한 신뢰성을 높이고자 하였다. 상관관계 분석에서는 선형회귀분석을 수행하여 깊이에 따른 비배수전단강도의 상관관계를 검토하였다. 또한, 동일한 위치에서 수행된 일축 및 삼축압축시험 자료를 분석하여 비배수전단강도의 상관관계식을 도출하였으며, 그 결과 심도와 비배수전단강도는 Su=0.015148D+0.04624의 관계를 보이며, 삼축압축시험에서 구한 비배수 전단강도가 일축압축시험에서 구한 비배수전단강도의 1.26배 정도 크게 평가되었다. The physical characteristics of the marine clay in the Korean Peninsula, specifically Pusan areas of the south coast of Korea, were previously studied and reliable data from harbor construction projects were used for the relationship analysis of geotechnical strength parameters. The sample of marine clay classified to ML, MH, CL, CH and ML-CL from USCS were included for the analysis while the samples classified to SC were excluded in order to raise the degree of data analysis. Geotechnical strength properties, such as undrained shear strength, sensitivity ratio, and effective friction angle were analyzed and evaluated using the data obtained from unconfined compression test, triaxial compression test and field vane test. Abnormal values were extracted through statistical analysis. Moreover, the reliability of the results was improved by performing the evaluation of disturbance. Linear regression analysis was used for the relationship analysis, between undrained shear strength and depth. The relationship equation between undrained shear strength and depth was derived from the analysis of unconfined and triaxial compression test data of samples obtained at same location. Consequently, The relationship between depth and undrained shear strength is Su=0.015148D+0.04624 and the undrained shear strength derived from the triaxial compression test was estimated to be about 1.26 of derived from the unconfined compression test.
허열 ( Yol Heo ),황인상 ( In Sang Hwang ) 충북대학교 건설기술연구소 2012 建設技術論文集 Vol.31 No.1
요즘의 건설 경향은 환경과 건설이 공존하는 추세이며 도로건설시 반드시 환경전문가와 사전재해영향성 검토 둥 올 받아야만 건설이 가능한 시점에 와 있다. 보통 현장에서 터널 시공시 설계에 주어진 터널연장은 꼭 그대로 시공하여야 만 하는 현상이지만 이는 현장에서 하기 힘든 줄 여기고 있으며 애초부터 터널을 연장하는 것은 불가피한 상황이 아니면 하지 않으려 한다. 하지만 설계시 정한 터널연장은 지형도를 바탕으로 지질조사와 암석시험, 탄성파탐사 등의 조사에 의해 정해지며 현장지형의 정확한 상세측량에 의해 이루어지는 것이 아니므로 현장에서는 상세측량과 기존 실시설계보고서를 참조하면 간단히 터널연장을 현장조건에 맞게 변경할 수 있다. NATM공법 특성상 설계에서 추정한 지보타입은 확정 설계가 아니고 굴착하면서 계측을 통하여 지보형식이 결정되므로 굴착전에 기존 지반조사를 참고하여 지보타입을 결정한 후 굴착하면서 지보형식을 최종결정하여도 문제가 없다고 판단된다. The present construction problem has a tendency coexist on environment and construction. When tunnel is constructed in the field, tunnel length given by design should be constructed as it is and so they intend to not carry out tunnel length if not in evitable. However, tunnel length by design is determined by ground survey, rock test and seismic exploration on the basis of topographical map. Therefore, tunnel length can be modified according to field conditions at the time of referring to detailed surveying and the existing design report in the field since tunnel length by design is not to be made by accurately detailed surveying of field topography. Therefore, in this study analyzed a plan for tunnel length adjustment required to construct eco-environmental roads to minimize the outbreak of cut slope by examining appropriateness of tunnel portal location. Tunnels on the basis of results that field engineers carry out, detailed topographical surveying of tunnel portal and ground surveying and analyze stability through field case study.